Joel Greenblatt's position in Rockwell Automation is currently worth $4.31 Million. That's 0.04% of their equity portfolio (507th largest holding). The first Rockwell Automation trade was made in Q3 2011. Since then Joel Greenblatt bought shares 27 more times and sold shares on 23 occasions. The stake costed the investor $3.9 Million, netting the investor a gain of 11% so far.